18418802031 has 144 divisors (see below), whose sum is σ = 34270041600. Its totient is φ = 9744489216.

The previous prime is 18418802023. The next prime is 18418802033. The reversal of 18418802031 is 13020881481.

It is not a de Polignac number, because 18418802031 - 2³ = 18418802023 is a prime.

It is a super-2 number, since 2×18418802031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18418802033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 25616890 + ... + 25617608.

It is an arithmetic number, because the mean of its divisors is an integer number (237986400).

Almost surely, 2^18418802031 is an apocalyptic number.

18418802031 is a deficient number, since it is larger than the sum of its proper divisors (15851239569).

18418802031 is a wasteful number, since it uses less digits than its factorization.

18418802031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843 (or 813 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The spelling of 18418802031 in words is "eighteen billion, four hundred eighteen million, eight hundred two thousand, thirty-one".